Auxiliary production clamp for power module and using method thereof

Abstract

An auxiliary production clamp including a first clamp element, a second clamp element, a pivot shaft, an elastic component and an ejector assembly for a power module and a using method thereof are disclosed. The second clamp element includes a through opening running through a second pressing end and spatially corresponding to a first pressing end of the first clamp element. The pivot shaft is pivotally connected between the first clamp element and the second clamp element. The elastic component is sleeved on the pivot shaft to provide a pressing force. The ejector assembly is provided on the second pressing end and spatially corresponding to the through opening. In a working state, the first pressing end presses against a upper first magnetic core of the power module, and an abutting end of the ejector assembly is driven to run through the through opening and push against the second magnetic core.

What is claimed is: 
     
         1 . An auxiliary production clamp for a power module, comprising:
 a first clamp element, comprising a first pressing end;   a second clamp element, comprising a second pressing end and a through opening, wherein the through opening runs through the second pressing end, and the second pressing end is spatially corresponding to the first pressing end;   a pivot shaft pivotally connected between the first clamp element and the second clamp element to allow the first pressing end and the second pressing end to approach or separate from each other;   an elastic component sleeved on an outer periphery of the pivot shaft and abutted between the first clamp element and the second clamp element to provide a pressing force causing the first pressing end and the second pressing end close to each other; and   an ejector assembly provided on the second pressing end and comprising an ejector pin, a metal tube, an engagement component and a compression spring, wherein the ejector pin comprises an abutting end, a clamped end and a limiting portion, the abutting end and the clamped end are two opposite ends of each other, the limiting portion is located between the abutting end and the clamped end, a top opening of the metal tube is aligned with the through opening of the second clamp element, and the metal tube and first clamp element are arranged on two opposite sides of the second clamp element, respectively, wherein the limiting portion of the ejector pin is accommodated in the metal tube, the clamped end runs through a bottom of the metal tube to engage with the engagement component, and the compression spring is accommodated in the metal tube and arranged between the limiting portion and the bottom of the metal tube, wherein when an external pressure is acted on the ejector pin, the limiting portion is slid along an interior of the metal tube to compress the compression spring, wherein when the external pressure is eliminated, an elastic force of the compression spring pushes the limiting portion to slide in an opposite direction along the metal tube until the engagement component abuts the bottom of the metal tube.   
     
     
         2 . The auxiliary production clamp according to  claim 1 , wherein the power module comprises:
 a first circuit board, comprising a first surface, a second surface and a through hole, wherein the through hole runs through the first surface and the second surface;   a magnetic component, comprising a first magnetic core and a second magnetic core, wherein the first magnetic core and the second magnetic core are disposed on the first surface and the second surface, respectively, and buckled on the first circuit board through the through hole; and   a second circuit board, comprising a third surface, a fourth surface, and a hollow opening, wherein the third surface faces the second surface, the hollow opening runs through the third surface and the fourth surface and is disposed and spatially corresponding to the second magnetic core of the magnetic component, and the second magnetic core of the magnetic component is at least partially exposed via the hollow opening;   wherein when the auxiliary production clamp is operated in a working state, the first pressing end presses against the first magnetic core, the second pressing end presses against the second circuit board, and the elastic force of the compression spring pushes against the limiting portion, so that the abutting end of the ejector pin is driven to run through the through opening of the second clamp element and the hollow opening of the second circuit board and push against the second magnetic core.   
     
     
         3 . The auxiliary production clamp according to  claim 2 , wherein the first pressing end comprises a convex arc portion having an arc surface convexly arranged toward the second pressing end, wherein when the first pressing end presses against the first magnetic core in the working state, the convex arc portion is tangent to a surface of the first magnetic core. 
     
     
         4 . The auxiliary production clamp according to  claim 3 , wherein the convex arc portion is a U-shaped structure. 
     
     
         5 . The auxiliary production clamp according to  claim 2 , wherein the first circuit board is a power board, the second circuit board is a control board, the first circuit board and the second circuit board are electrically connected through a conductive connector welded therebetween, wherein the conductive connector and the magnetic components are misaligned to each other. 
     
     
         6 . The auxiliary production clamp according to  claim 2 , wherein the magnetic component has a center position corresponding to the hollow opening of the second circuit board. 
     
     
         7 . The auxiliary production clamp according to  claim 2 , wherein the first magnetic core is bonded to the second magnetic core and the first surface using a glue. 
     
     
         8 . The auxiliary production clamp according to  claim 1 , wherein when the auxiliary production clamp is operated in an initial state, the pressing force of the first clamp element and the second clamp element drives the first pressing end to press against the ejector pin and the compression spring, so that the ejector pin does not run through the through opening. 
     
     
         9 . The auxiliary production clamp according to  claim 1 , wherein when the compression spring pushes against the ejector pin through the limiting portion, the engagement component contacts and abuts against the bottom of the metal tube, and the abutting end protrudes out of the through opening to form a protruding length. 
     
     
         10 . The auxiliary production clamp according to  claim 9 , wherein when the auxiliary production clamp is operated in an initial state, the abutting end is accommodated in the metal tube, the limiting portion is close to the bottom of the metal tube to compress the compression spring, and the clamped end and the engagement component are slid and separated from the bottom of the metal tube to form a compressible distance, wherein the compressible distance is greater than the protruding length. 
     
     
         11 . The auxiliary production clamp according to  claim 10 , wherein when the auxiliary production clamp is operated in a working state, the clamped end and the engagement component are slide and separated from the bottom of the metal tube to form a working distance, and the working distance is smaller than the compressible distance. 
     
     
         12 . The auxiliary production clamp according to  claim 1 , wherein the pressing force is greater than the elastic force of the compression spring. 
     
     
         13 . The auxiliary production clamp according to  claim 1 , wherein the first clamp element and the second clamp element are made of a high-temperature-resistant metal material. 
     
     
         14 . The auxiliary production clamp according to  claim 1 , wherein the first clamp element further comprises a first operating end and a first pivoting portion, the first operating end and the first pressing end are opposite to each other, and the first pivoting portion is located between the first operating end and the first pressing end, wherein the second clamp element further comprises a second operating end and a second pivoting portion, the second operating end and the second pressing end are opposite to each other, and the second pivoting portion is located between the second operating end and the second pressing end, wherein the pivoting shaft runs through the first pivoting portion, the second pivoting portion and the elastic component, and the elastic component has two ends connected to the first operating end and the second operating end to push against the first operating end and the second operating end, respectively, so that the pressing force is provided between the first pressing end and the second pressing end. 
     
     
         15 . The auxiliary production clamp according to  claim 14 , further comprising two circlips arranged at two opposite ends of the pivot shaft, wherein the first pivoting portion and the second pivoting portion are located between the two circlips. 
     
     
         16 . A using method of an auxiliary production clamp for a power module, comprising a step of:
 providing the auxiliary production clamp, wherein the auxiliary production clamp is operated in a working state to clamp a first magnetic core, a first circuit board, a second magnetic core and a second circuit board of the power module, wherein the first circuit board comprises a first surface, a second surface and a through hole, and the through hole runs through the first surface and the second surface, wherein the first magnetic core and the second magnetic core are disposed on the first surface and the second surface, respectively, and buckled on the first circuit board through the through hole, wherein the second circuit board comprises a third surface, a fourth surface, and a hollow opening, the third surface faces the second surface, the hollow opening runs through the third surface and the fourth surface and is disposed and spatially corresponding to the second magnetic core, and the second magnetic core is at least partially exposed via the hollow opening, wherein the auxiliary production clamp comprises:   a first clamp element, comprising a first pressing end;   a second clamp element, comprising a second pressing end and a through opening, wherein the through opening runs through the second pressing end, and the second pressing end is spatially corresponding to the first pressing end;   a pivot shaft pivotally connected between the first clamp element and the second clamp element to allow the first pressing end and the second pressing end to approach or separate from each other;   an elastic component sleeved on an outer periphery of the pivot shaft and abutted between the first clamp element and the second clamp element to provide a pressing force causing the first pressing end and the second pressing end close to each other; and   an ejector assembly provided on the second pressing end and spatially corresponding to the through opening and the hollow opening, wherein when the auxiliary production clamp is operated in the working state, the first pressing end presses against the first magnetic core, the second pressing end presses against the second circuit board, and the pressing force of the elastic component pushes against the ejector assembly, so that an abutting end of the ejector assembly is driven to run through the through opening of the second clamp element and the hollow opening of the second circuit board and push against the second magnetic core.   
     
     
         17 . The using method according to  claim 16 , wherein the ejector assembly comprises an ejector pin, a metal tube, an engagement component and a compression spring, wherein the ejector pin comprises the abutting end, a clamped end and a limiting portion, the abutting end and the clamped end are two opposite ends of each other, the limiting portion is located between the abutting end and the clamped end, a top opening of the metal tube is aligned with the through opening of the second clamp element, and the metal tube and first clamp element are arranged on two opposite sides of the second clamp element, respectively, wherein the limiting portion of the ejector pin is accommodated in the metal tube, the clamped end runs through a bottom of the metal tube to engage with the engagement component, and the compression spring is accommodated in the metal tube and arranged between the limiting portion and the bottom of the metal tube, wherein when an external pressure is acted on the ejector pin, the limiting portion is slid along an interior of the metal tube to compress the compression spring, wherein when the external pressure is eliminated, an elastic force of the compression spring pushes the limiting portion to slide in an opposite direction along the metal tube until the engagement component abuts the bottom of the metal tube. 
     
     
         18 . The using method according to  claim 17 , wherein the pressing force is greater than the elastic force of the compression spring. 
     
     
         19 . The using method according to  claim 16 , wherein the second magnetic core and the first circuit board are arranged in sequence from top to bottom, and the second magnetic core is pre-placed on the second surface of the first circuit board, so that second magnetic core is allowed to be pre-bonded to the second surface by gravity of the second magnetic core. 
     
     
         20 . The using method according to  claim 19 , wherein the second circuit board, the second magnetic core and the first circuit board are arranged in sequence from top to bottom, and at least one conductive connector is connected to the second surface and the third surface by a welding process. 
     
     
         21 . The using method according to  claim 20 , wherein the first magnetic core, the first circuit board, the second magnetic core and the second circuit board are arranged in sequence from top to bottom, and the first magnetic core is attached to the second magnetic core and the first surface by a glue. 
     
     
         22 . The using method according to  claim 16 , wherein the first circuit board is a power board, the second circuit board is a control board, the first circuit board and the second circuit board are electrically connected through at least one conductive connector welded therebetween, wherein the at least one conductive connector and the second magnetic core are misaligned to each other. 
     
     
         23 . The using method according to  claim 16 , wherein the second magnetic core has a center position corresponding to the hollow opening of the second circuit board. 
     
     
         24 . The using method according to  claim 16 , wherein the first magnetic core is bonded to the second magnetic core and the first surface using a glue. 
     
     
         25 . The using method according to  claim 24 , wherein the glue is produced for a high temperature curing time, and the auxiliary production clamp presses the first magnetic core and the second magnetic core together within the high temperature curing time. 
     
     
         26 . The using method according to  claim 16 , wherein the first clamp element, the second clamp element, the elastic component and the ejector assembly are made of a high-temperature-resistant metal material.